define(["core/chart_base"],function(a){function b(){a.prototype.constructor.apply(this,arguments)}return b.prototype=Object.create(a.prototype),b.prototype.TYPE="pie",b.prototype.addSeries=function(b){if(null===b.getColor()){for(var c=[],d=0;d<b.getCount();d++)c.push(this.COLORSET[d%a.prototype.COLORSET.length]);b.setColors(c)}return a.prototype.addSeries.apply(this,arguments)},b.prototype._validateSeries=function(){if(this._series.length>=1)throw new Error("Pie charts only support one serie.");return a.prototype._validateSeries.apply(this,arguments)},b});